Cisco Security Intelligence Operations has detected increased activity related to spam e-mail messages that claims to contain a notification regarding an update of the recipient's Facebook account agreement. The text in the e-mail message instructs the recipient to execute a file within the .zip attachment to accept the new agreement. However, the .zip attachment contains a malicious .exe file, which when executed, attempts to infect the target system with malicious code.
E-mail messages that are related to this threat (RuleID2531) may contain the following files:
agreement.zip
agreement.exe
The agreement.exe file has a file size of 19,456 bytes. The MD5 checksum, which is a unique identifier of this executable file, is the following string: 0xC175B5AFC8BB7A7F716CCF3829412FF1
The following text is a sample of the e-mail message that is associated with this threat outbreak:
Subject: new account agreement
Message Body:
Dear Facebook user,
Due to Facebook policy changes, all Facebook users must submit a new, updated account agreement, regardless of their original account start date.
Accounts that do not submit the updated account agreement by the deadline will have restricted.
Please unzip the attached file and run "agreement.exe" by double-clicking it.
Thanks,
The Facebook Team
Confirmation Code #: 342479428
Cisco Security Intelligence Operations analysts examine real-world e-mail traffic data that is collected from over 100,000 contributing organizations worldwide. This data helps provide a range of information about and analysis of global e-mail security threats and trends. Cisco will continue to monitor this threat and automatically adapt IronPort systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.
Cisco IronPort Virus Outbreak Filters protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. E-mail that is managed by Cisco and end users who are protected by Cisco IronPort web security appliances will not be impacted by these attacks. Cisco IronPort appliances are automatically updated to prevent both spam e-mail and hostile web URLs from being passed to the end user.
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